Dental spray bottle



y 7, 1959 E. w. BARKSDALE I 2,893,608

' I DENTAL SPRAY BOTTLE.

Filed May 14, 1956 I ,M I 9 I M m y. j M v I: h 0 2.

. INVENTOR.

DGA2 W BAP/(SDALE BY U wd t rs, ,Pw

z...) ,grilirzenanl .1.

. This invention relates to'spray bottles and is particularlymconcerned with receptacles xforsholding and delivering spray liquid such as thatusedlby. dentists as a spray coolant in the drillingbfte'ethc gliFOl' many years dentists 'haveutilizedwspray devices forthe supply of coolant liquid duringia drillingoperation,'..which devices have usually been in the form of a uniformly cylindrical chamber having a central air pres.- sure supply tube extending to-the bottom thereof and zwith a discharge at the top. through'aavhiohthe liquid forced upwardly by pressurized air is'dispensed through aisuitable spray nozzle. Thewcylindr ical' chambers. of these; devices constituted a m'anipulatoryf handle. With the advent of r high speed-drilling. operations, the requirements for coolant fluid have increaseddue to the greater heat generated by such high speed'drilling. It has'thus been found that the=uniforrnly cylindrical bottles, heretofore used of such-size. as.to conveniently fit therhand are inadequatefor maintaining a constant flow of .liquid at the increasedrate required-commensurate withtheincrease in the drilling. speed; Obviously, the m'ere increasein the diameter of thespray bottle to accommodate a greater amount of liquid is an inappropriate-answer to this new need,-since the bottle has conveniently been used as the handle by which the spray device is manipulated. Furthermore, since the area over which pressureis applied determinestherapidity of pressure responsive flow, such. increased dimensions would be detrimental to rapid response.

.- ,It is :therefore an object of the-present invention to provide a novel and improved means for increasing the capacity of a dental spray bottle; 1 Y 1 I -.Another object ofthe presentginve'ntion is to provide in conjunction with a spray bottle oflconventional dimensions a source of liquid supply which will'automatical-1y replenish the bottle between spraying operations.

A further object of the present invention is to provide an annular liquid supply tank for a conventionally dimensioned dental spray bottle.

It is also an object to provide an automatic valve arrangement for a supply chamber associated with a dental spray bottle by which liquid will be replenished to the bottle automatically between spraying operations.

Numerous other objects, features and advantages of the present invention will be apparent from consideration of the following specification taken in conjunction with the accompanying drawing, in which:

Fig. 1 is a side elevation of one preferred embodiment of the present invention.

Fig. 2. is a vertical central cross-section of the device shown in Fig. 1.

Fig. 3 is a top plan view with portions of the top broken away to show the location of the valves.

Fig. 4 is a detail view illustrating the manner in which the bottle is connected with the air supply source and with the discharge head.

While the present inventive concept may be embodied in various structural arrangements and designs, that form 2,893,608 Patented July 7, 1959 of the invention here shown by way of illustration may be briefly defined as including a central spray bottle of conventional cross section whereby it is adapted for easy manipulation using the body of the bottle as a handle. Surrounding the central bottle there is provided an annular supply chamber preferably of such dimensions as to provide a replenishing supply of liquid for the bottle many times the volume of the bottle itself. In terconnecting the supplemental chamber and the bottle, there is provided an upper and a lower valve, each of which is self-acting and pressure responsive, the arrangement being such that as pressure is applied to the inner bottle, the Valves will be forced to a closed position while during the intervals of non-spraying the valves will move by gravity to be unseated, permitting the flow of liquid from the supply chamber into the bottle through the lower valve and permitting air to flow above the liquid to compensate for that displaced by the liquid in its passage to the bottle. To the upper end of the bottle, an air supply and liquid discharge head of generally conventional form is affixed.

Referring now to the structure shown by the drawings, it will be seen that there is provided an inner cylinder or bottle 10, here shown as cylindrical in form and of transverse dimension generally of conventional size so as to provide for manipulation of the spray by gripping the lower end of the bottle 10 as is the current practice. Such bottles are customarily metallic. The bottle 10 may be somewhat longer than conventionally used so as to accommodate the supplemental receptacle hereinafter described. At the top of the bottle 10 there is provided the usual internally threaded nipple 11 which is adapted to receive the air intake and spray discharge head 12, air being supplied througha tube 13 controlled by a'valve 14 while the spray is discharged through a tube 13'. The compressed air flowing inwardly from the tube 13 enters bottle 10 through apertures 12a surrounding tube 16 causing an increased pressure within the bottle which forces liquid upwardly through the tube 16, the flow of liquid being controlled by needle valve 15. As the stream of liquid reaches the stream of air in the head 12, the liquid is atomized and discharged through tube 13. For periodically replenishing the liquid within the bottle 10, there is mounted about the bottle an annular supply chamber formed by upper and lower end plates 17 and 18, the upper plate being provided with a filling port and closure therefor as indicated at 19. Between the plates 17 and 18 a cylindrical body 20 which may be of transparent material is mounted gaskets 21 being provided to insure the watertight assembly of the end plates with the body. The end plates 17 and 18 are preferably of frusto-conical shape, and within the confines of lower end 17 there is provided a valve member 23 engaged through a port 24 in the side of the bottle 10. The valve includes a generally cylindrical but inwardly expanding tapering body having an end port 25 and enclosing a valve ball 26. Similarly, within the confines of the upper end 18 there is a like valve 27 having an inwardly expanding tapering body 28 mounting a valve ball 29 and having an end opening 30.

It will be noted that when pressure is not applied through the valve 14 to the bottle 10, the valve balls 26 and 29 will roll by gravity toward the bottle 10, the valve openings being formed such that liquid may pass around the balls so that in this position liquid from the supply chamber will pass through the lower valve 23 into the bottle 10 While air is free to pass through the upper valve 27 to compensate for the displaced liquid. However, when valve 14 is open, air pressure is applied to the bottle 10. Such pressure will react on the balls 26 and 29 forcing them outwardly against the openings 25 and 30 to close the valves and preclude the escape of air into the supply chamber.

It will thus be seen that in the operation of the device between each application of pressure and hence discharge of liquid from the bottle 16 the valves will be opened to permit the flow of replenishing liquid from the supply chamber to the bottle; however, upon the reapplication of pressure upon the opening of the valve 14, the valves 23 and '27 will be closed precluding escape of air from the bottle 10 and hence obviating any diminishment of the normal spray action in prompt response to the application of pressure.

It will be important to note that even if convenience of manipulation were not sacrificed by the use of a larger bottle, there would, however, be an undesirable lag in spray response after the opening of valve 14, since the pressure admitted by the valve acts on the upper surface of the liquid, the smaller the container the more prompt and favorable will be the spray reaction. If, however, this dimension were increased, as for instance to the extent of the surface area of liquid in the auxiliary supply chamber here provided, the response would be slow and unfavorable and entirely unsatisfactory for the delicate operations which are to be accompanied by the coolant flow.

In the practice of the invention it will, of course, be understood that numerous changes, modifications and the full use of equivalents may be resorted to without departure from the spirit or scope of the invention as outlined in the accompanying claims.

I claim: I

1. In a device of the character defined, a conventional elongate cylindrical spray bottle constituting a manipulating handle and including an air intake and spray discharge head, an annular liquid supply receptacle surrounding said bottle, valve means providing communication between the interior of said bottle and said receptacle, said valve means being pressure responsive to permit the flow of liquid from said receptacle to said bottle when atmospheric pressure is applied Within the bottle and to automatically preclude such flow when pressure above atmospheric is applied Within said bottle,- together with a second pressure responsive valve for permitting the passage of air from said bottle to said receptacle.

2. A spray including a central cylindrical spray bottle constituting an elongate cylindrical manipulating handle and including an air intake and spray discharge head, a liquid supply receptacle attached thereto, and valve means interconnecting said bottle and said receptacle, said valve means being pressure responsive and including an upper air flow control valve and a lower liquid flow control valve.

3. A spray including a central cylindrical spray bottle constituting an elongate cylindrical manipulating handle and including an air intake and spray discharge head, a liquid supply receptacle attached thereto, valve means interconnecting said bottle and said receptacle, said valve means being pressure responsive and including an upper air flow control valve and a lower liquid flow control valve, each said valve including a tapered valve chamber and a ball movable by gravity in said chamber to valve opening position;

4. A spray including a central cylindrical spray bottle constituting an elongate cylindrical manipulating handle and including an an intakeand spray discharge head, a liquid supply receptacle attached thereto and valve means interconnecting said bottle and said receptacle, said valve means being pressure responsive and including an upper air flow control valve and a lower liquid flow control valve, each said valve including a tapered valve chamber and a ball movable by gravity in said chamber 'to valve opening position and movable by pressure in the opposite direction to close the valve.

5.. A spray bottle including ap elongate hollow cylin drical member forming a chamber, means for supplying air under pressure to said chamber, means for delivering liquid from said chamber as a result of the application of air under pressure, a liquid supply receptacle mounted on the upper end of said chamber, and separate control means for governing the flow of liquid from the receptacle to the chamber and the fiow of air from the chamber to the receptacle; said means comprising pressure responsive valves, each said valve including an inclined valve chanlher and a ball valve freely movable therein.

6.- A spray bottle comprising an elongate bottle, a liquid supply receptacle fastened about said bottle including a frus'to-conical bottom end plate secured intermediate the endsof said bottle, and a companion frosto-conical top end plate adjacent the upper end of said bottle, a cylindrical wall mounted betw'een' and sealed to said end plates, a pressure=closed gravity-opened air flow control valve between said receptacle and said bottle within the confines of said upper plate, and a pressure-closed gravity opened liquid flow control valve between said receptacle and said bottle within the confines of said lower plate;

References Cited in the file of this patent 

